They will physically bolt on. There may be a combustion chamber size difference between the early and late heads. I can't find my information about later model 302's after '71. But if the engine is stock, a small increase in compression will not hurt.
Jason
__________________
"Giggity" Missing your Prius? Check under my tires.
'08 Dodge 2500 MegaCab 4wd, 6.7 Cummins, 6 spd auto, DPF & EGR fell off
'93 F350 CC 4wd 7.3L 5spd, 240K miles
'69 Bronco SEFI 5.0, NP435, geared, locked...
'77 F150 4wd 351M, 435, 205
Also note '73-'76 has a slightly taller deck to lower compression (to fight Nox before they figured out EGR).
Also, not sure when pedestal rockers came into play, but be careful if you change from one to the other. If the older ones have adjustable, you can probably use the pushrods from the older engine. Check this out before you run it.
Also, not sure when pedestal rockers came into play, but be careful if you change from one to the other. If the older ones have adjustable, you can probably use the pushrods from the older engine. Check this out before you run it.
Rail rockers were introduced around '66. In the mid 70's, the studs were changed to the positive stop style. But neither should not be a factor here. As long as you match the rockers/ pushrods to the cyl head style, you will be fine.
Jason
__________________
"Giggity" Missing your Prius? Check under my tires.
'08 Dodge 2500 MegaCab 4wd, 6.7 Cummins, 6 spd auto, DPF & EGR fell off
'93 F350 CC 4wd 7.3L 5spd, 240K miles
'69 Bronco SEFI 5.0, NP435, geared, locked...
'77 F150 4wd 351M, 435, 205
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